Intel tigerlake iGPU firmware may not be supported by hardware CPU - i3-1115G4

after adding i915kms module to /etc/rc.conf, when starting a DE (Wayfire) in sh, It waits for drm device and then it throws an error, If I recall correctly 'seatd0 ... ' something like that.

After rebooting the system to see if issue still persists, It succesfully load the iGPU firmware and it then it fails and stuck on bootmenu, Do I have to install supported kernel? or are there any workaround for it to work? (still learning)
 

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Your photo indicates that firmware for TigerLake is somehow successfully loaded.

FYI:
  • If you installed firmware ports via graphics/gpu-firmware-intel-kmod or graphics/gpu-firmware-kmod ports (or pkg built with them), i915_tgl_dmc_ver2_12_bin.ko (and many more firmware kmods) in /boot/modules.
  • If you ran fwget(8), you'll possibly have firmwares your hardware needs and FreeBSD has in /boot/firmware with different filenames (cannot determine which is for which, though) with *.ucode in names.
So the problem could be in seatd as you mentioned.
Do you have sysutils/seatd installed?
And if yes, do you have
Code:
seatd_enable="YES"
line in your /etc/rc.conf[.local]?
 
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